The correct answer is probably not the one you come up with first. Requires you to have a good grasp of the scenario and some lateral thinking.

4 days they didn't ask abt nights

16 days

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He travels 9 miles a day, so just over 2.

Interesting. I too think its 16. travels net 1 a day, after 15 days he's 15 miles. On the 16th day he'll row miles 15 to 20 and obviously stop so he's not gonna drift back down. In fairness I think Hell's answer would get some points for thinking outside the box!!

Flipping of a coin. Heads $20, tails -$5. Do you like this game. Second game, $20million heads, tails -$5. Do you prefer the second game? Last game is the same values as the first game, we can play it once or 100 times which would you prefer and why?

I think actually the question is about three games. You should prefer the second game because the expectation is higher: 20mill*.5+(-5)*.5 = almost 10 mill rather than 20*.5+(-5)*.5=7.50 The third game is the same as the first game but you can play it once or 100 times. You want to play it 100 times because of the law of large numbers

clock hands cross 11 times over 12 hours =&gt; 360/11 = 32.72 degrees for the first cross, x2 for the second cross, x3 for the 3rd. x5 for the cross after 5 oclock, 32.72 * 5 = 163.63 degrees = 5:27 or system of equations with 6 degrees for every minute, 0.5 degrees every hour

The first three questions are mental math. I still remember the hardest one is calculating the 39% of 569 without any pen or paper. The next question is a simple probability: pick 2 cards from a set of poker without 2 Jokers, what is the probability that both cards are Ks. The last one is brain teaser: what is the angle between the minute hand and hour hand on a clock when 9:30.

I remember it this way: (3 groups of 2) Intrinsic value: Strike price and spot price of the underlying asset Time value: Time to maturity and volitility of the underlying 'Cash offsets': Risk-free interest rate and (stock dividends)